package com.example.dict;

import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;

import android.content.Context;
import android.hardware.Camera;
import android.hardware.Camera.AutoFocusCallback;
import android.hardware.Camera.PictureCallback;
import android.util.Log;
import android.view.SurfaceHolder;
import android.view.SurfaceView;

public class CameraPreview extends SurfaceView implements
		SurfaceHolder.Callback {
	private SurfaceHolder mHolder;
	private Camera mCamera;

	public CameraPreview(Context context) {
		super(context);
		try {
			mCamera = Camera.open(); // attempt to get a Camera instance
		} catch (Exception e) {
			// Camera is not available (in use or does not exist)
		}
		// Install a SurfaceHolder.Callback so we get notified when the
		// underlying surface is created and destroyed.
		mHolder = getHolder();
		mHolder.addCallback(this);
		// deprecated setting, but required on Android versions prior to 3.0
		mHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
	}

	public void surfaceCreated(SurfaceHolder holder) {
		// The Surface has been created, now tell the camera where to draw the
		// preview.
		try {
			mCamera.setPreviewDisplay(holder);
			Camera.Parameters params = mCamera.getParameters();
			params.setFocusMode("macro");
			mCamera.setParameters(params);
			mCamera.setDisplayOrientation(90);
			mCamera.startPreview();
		} catch (IOException e) {
			// Log.d(TAG, "Error setting camera preview: " + e.getMessage());
		}
	}

	public void surfaceDestroyed(SurfaceHolder holder) {
		// empty. Take care of releasing the Camera preview in your activity.
	}

	public void surfaceChanged(SurfaceHolder holder, int format, int w, int h) {
		// If your preview can change or rotate, take care of those events here.
		// Make sure to stop the preview before resizing or reformatting it.

		if (mHolder.getSurface() == null) {
			// preview surface does not exist
			return;
		}

		// stop preview before making changes
		try {
			mCamera.stopPreview();
		} catch (Exception e) {
			// ignore: tried to stop a non-existent preview
		}

		// set preview size and make any resize, rotate or
		// reformatting changes here

		// start preview with new settings
		try {
			mCamera.setPreviewDisplay(mHolder);
			mCamera.startPreview();

		} catch (Exception e) {
			// Log.d(TAG, "Error starting camera preview: " + e.getMessage());
		}
	}

	public void releaseCamera() {
		if (mCamera != null) {
			mCamera.stopPreview();
			mCamera.release();
			mCamera = null;
		}
	}

	public Camera getCamera() {
		return mCamera;
	}

	public void openCamera() {
		if (mCamera == null) {
			mCamera = Camera.open();
			mCamera.startPreview();
		}
	}

	public void setFocus(float x, float y) {

	}

	public void takePicture(Camera.PictureCallback handler) {
		mCamera.autoFocus(new AutoFocusCallback(){

			public void onAutoFocus(boolean arg0, Camera arg1) {
				// TODO Auto-generated method stub
				if(arg0){
					Log.e("here","set auto focus");
				}
				else{
					Log.e("here","auto focus fail");
				}
			}
			
		});
		mCamera.takePicture(null, null, handler);
	}
}